I’d prefer not to include Leia with the ghosts. Her body is still sitting on Jungleworld, but I think we can get away with just hearing her voice because that seems to come first, as with Qui-Gon and Obi-Wan. Kinda/sorta. Plus her appearance at the end is that much nicer to see.
Interestingly enough, according to jedipaxis, in an earlier cut the phantoms of Luke and Leia appeared in front of Palpatine and gave the finishing blow. You probably won’t go that route given that in your version Leia’s body stays in the jungle till the end, although a version with Leia’s ghost could be useful for other edits where her body disappears after Kylo’s vision with Han.